Claudio Rojas Email & Phone Number

Chile

Santiago, Chile

Santiago. Chile

1. Process Consultant in Collahuasi. a. Studies of chloride leaching of secondary sulphides as alternative to bioleaching processb. Business Cases for Silver and Gold Ores2. Stars Investments.a. Mining Business Consulting.3. RMV Ingehidromet Limited.a. Support in operation consultancy for a large hydrometallurgical plant

Arica Province, Chile

Leading a team of: 360 people with 5 direct reports Responsible for the operation of the plant. This include maintenance, operation, supply chain, investigation and development, others.

Collahuasi

1. Project Manager of Conceptual an PFS Study “Modular Growing of Collahuasi toexpand the capacity - 210 ktpd”2. Operational analysis and support to concentrator: Determination of cause effect of different operational and metallurgical parameters, analysis SWOT, verification of assumptions and risks. 3. Metallurgical planning of medium and long term (development of models for TPH, recoveries and grade of concentrate, back analysis) review of studies and geo-metallurgical tests of milling and flotation.4. New Business Opportunities: Identification, analyzing and evaluation of business opportunities, planning and execution of tests, business cases and studies.5. Support in development and implementation of strategy of Vice-Presidency of Development and Sustainability.

Santiago Of Chile

1. Project Manager. "Increase of capacity of heap leaching pads". Support in the EIA process.2. Project Manager Conceptual Engineering and Pre Feasibility: “Leaching of secondary ores”. Production of 65,000 tons of cathodes per year. Support in the EIA process.3. Development of metallurgical testing for the leaching projects.4. Support in the development and implementation of the Strategy of the Development Vice Presidency.

Johannesburg Area, South Africa

1. Conceptual and basic engineering in copper and cobalt Kalumines Project (35,000 t Cu/y; tank and heap leaching). 2. Coordinating and evaluating advanced hydrometallurgical research projects.3. Tres Valles Project (22,000 t Cu/y: Lix-SX-EW). Coordinating and evaluating process development study. Develop of the conceptual, basic and detailed engineering. EPC (Bateman, SX-EW plant). Preparation of Environment Impact Study. 4. Risks identification and possible fatal flaws in the evaluation of opportunities in the mineral area. Support in businesses evaluation, supplying CAPEX and OPEX information in technical-economical evaluation. I have participated evaluating projects in: Copper sulphide and oxide leaching. (Chile), Copper – Cobalt leaching (DRC and Zambia), Copper bioleaching. Kazakhstan.5. Propose alternative solutions to overcome project problems.6. Analysis of key cost drivers to assist with budgeting/forecasting of costs and assisting with development of capital and technical plans for research studies and new projects.7. Identify and recommend specific technologies to strategically develop business objectives and potential opportunities

1. Operations Planning Management.2. Planning of oxide plant production.3. Technical evaluation of extending of plant life by bioleaching Project.4. Process control5. Metallurgical accountability6. Design of column leaching program for exotic mineral with high copper wad content.7. Improvement of agglomeration quality by electric conductivity measurements

1. Improvements in leaching techniques in order to decrease leaching cycle and to increase copper recovery.2. Planning of oxide plant production3. Design of column leaching program for different type of ore

1. Operations Planning Management.2. Planning of oxide plant and sulphide plant productions.3. Technical evaluation of extend plant life by dump leaching.4. Process control5. Design of new metallurgical balance system by using the Lagrange’s method6. Evaluation of ore sample system.7. "Taking Self Care" Program implementation at the chemical and metallurgical laboratory.8. Design of column leaching program for different type of ore.9. Improvements in flotation techniques in order to increase copper concentrate grade and copper recovery in flotation plant.10. Start up of the on-line analysis system for flotation plant.11. Vat Leaching cycle optimization. (2003, ANGLO BASE METAL INNOVATION AWARD).

1. Change of the electrolyte distribution system at the Spintek’s filters.2. Change of the plant operational manpower distribution.3. Feasibility study of a serie/parallel circuit, in order to increase treatment capacity of the SX plant.

1. Decrease of the Vat leaching residue unloading cycle. 2. Start up of dump leach plant.3. Start up of new sulfuric acid distribution and reception terminal.4. Five Stars NOSA certification.5. ISO 9000 and ISO 14000 certification

1. Increase of SX-EW plant production capacity. 2. Current efficiency analysis at EW plant.3. Extraction efficiency analysis at SX plant

1. Processes engineer. Dump leaching plant design: Evaluation of 2 and 3 stages countercurrent circuit. 2. Engineering and study and Implementation Manto Verde Pilot Plant for Run of mine leaching

1. Semi industrial pilot plant construction for ROM leaching of low grade ore. 2. Operation and evaluation for ROM leaching of low grade ore

1. Column Iso-pH and leaching test for of Codelco. Salvador Division.2. Copper smelted dust leaching and escorodite precipitation test. 3. Pilot plant metallurgist. El ABRA MINE. Phelps Dodge

Chemical Engineer, Engineering

Master Of Business Administration (Mba)